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Electric energy. Electrical coil ( inductor ) by Ruhmkorff with Foucault switch " Physique
LKO22A01_034

Electric energy. Electrical coil ( inductor ) by R...

Large eddy switch of Leon Foucault ( 1819-1868 ) french physicist ( electric energy ) and
LKO22A01_033

Large eddy switch of Leon Foucault ( 1819-1868 ) f...

Electric energy.Electrolysic of hydrofluoric acid. Fluorine insulation. " Physique populaire " by
LKO22A01_037

Electric energy.Electrolysic of hydrofluoric acid....

Steam crane
LKO09A01_098

Steam crane

James Prescott Joule
LKO17A00_052

James Prescott Joule

Aerial underground of Chicago - US
LKO17A00_013

Aerial underground of Chicago - US

Benjamin Thompson, Count Rumford.
LKO07031_079

Benjamin Thompson, Count Rumford.